Presentation on the universe
... Dark Energy Counteracting the effect that dark matter has in slowing the universe's expansion, dark energy has been discovered...and is seen to be speeding up the expansion of the universe. While the expansion of nearby stars is slowing down...like a ball would if thrown straight up in the air, the ...
... Dark Energy Counteracting the effect that dark matter has in slowing the universe's expansion, dark energy has been discovered...and is seen to be speeding up the expansion of the universe. While the expansion of nearby stars is slowing down...like a ball would if thrown straight up in the air, the ...
Curriculum Vitae - Centre for Astrophysics and Supercomputing
... • 2005: Marie Curie Early Stage Researcher 3-year Fellowship through the EU MAGPOP (Multi-wavelength Analyses of Galaxy Populations) FP6 Research & Training Network (awarded by host: IAP, France) • 2005: Portuguese Ministry of Science and Education Grant in support for participation in ESA Summer Sc ...
... • 2005: Marie Curie Early Stage Researcher 3-year Fellowship through the EU MAGPOP (Multi-wavelength Analyses of Galaxy Populations) FP6 Research & Training Network (awarded by host: IAP, France) • 2005: Portuguese Ministry of Science and Education Grant in support for participation in ESA Summer Sc ...
Cosmological Implications of Trace
... temporary mass-dependent charge segregation between faster less-massive electrons and slower moving protons. Only in general relativity does there appear to have been previous discussion of scenarios in which trace-charge imbalances play a key role in resisting gravitational attraction (Weyl [1917], ...
... temporary mass-dependent charge segregation between faster less-massive electrons and slower moving protons. Only in general relativity does there appear to have been previous discussion of scenarios in which trace-charge imbalances play a key role in resisting gravitational attraction (Weyl [1917], ...
Periodic Universal Gravitation Resulting in the Phenomenon of Dark
... From equation (3) and (4), we can know that: 1) dr/dt conducted from the periodic universal gravitation on two objects m1 and m2 is independent of m1 and m2, indicating the dr/dt is the speed of cosmic expansion. So equation (3) is referred to as the cosmic expansion equation. 2) The cosmic expansio ...
... From equation (3) and (4), we can know that: 1) dr/dt conducted from the periodic universal gravitation on two objects m1 and m2 is independent of m1 and m2, indicating the dr/dt is the speed of cosmic expansion. So equation (3) is referred to as the cosmic expansion equation. 2) The cosmic expansio ...
gravity - Nikhef
... What is so interesting about them? We already have telescopes, neutrino detectors and stuff like that to study the Universe, right? ...
... What is so interesting about them? We already have telescopes, neutrino detectors and stuff like that to study the Universe, right? ...
TF_final3 - Arecibo Observatory
... they generate expansion of the universe. So, using Doppler approximately 100 new stars per year. LIRGs are effect, the frequency scale of the spectrum was converted into velocity scale. The velocity width of the result of mix or collisions of galaxies. the line is related to the rotational speed of ...
... they generate expansion of the universe. So, using Doppler approximately 100 new stars per year. LIRGs are effect, the frequency scale of the spectrum was converted into velocity scale. The velocity width of the result of mix or collisions of galaxies. the line is related to the rotational speed of ...
The Submillimeter Frontier: A Space Science Imperative
... • z ∼ 3−20 – Secondary structure formation. Cloud cooling is enhanced by the inclusion of newly synthesized heavy elements. Galaxies grow by collisions and absorption of smaller fragments, with a rate governed by the statistics of the primordial density fluctuations and their growth. Many are very ...
... • z ∼ 3−20 – Secondary structure formation. Cloud cooling is enhanced by the inclusion of newly synthesized heavy elements. Galaxies grow by collisions and absorption of smaller fragments, with a rate governed by the statistics of the primordial density fluctuations and their growth. Many are very ...
ASTR 104 - Wagner Homework 1
... 6. What advantages does the Hubble Space Telescope have over ground based telescope? What are the disadvantages of having a telescope in space? 7. What is the primary factor that limits the clarity of a ground based optical telescope? What are some (more than one!) methods that astronomers have used ...
... 6. What advantages does the Hubble Space Telescope have over ground based telescope? What are the disadvantages of having a telescope in space? 7. What is the primary factor that limits the clarity of a ground based optical telescope? What are some (more than one!) methods that astronomers have used ...
Conformal Gravity
... standard theory for gravity. But nowadays there is data from far more distant objects, like other galaxies or galaxy clusters. On these distance scales there arise several problems. For example the measurement of rotational velocities of stars or gas in galaxies differs very strongly from the expect ...
... standard theory for gravity. But nowadays there is data from far more distant objects, like other galaxies or galaxy clusters. On these distance scales there arise several problems. For example the measurement of rotational velocities of stars or gas in galaxies differs very strongly from the expect ...
Supermassive Black Holes and the Growth of Galaxies
... The equations of gravity tell us that the escape velocity for a spherical object (such as a star or planet) is given by vesc = GM/R. Thus, if we make an object more massive (larger M) or compress it (smaller R), then we increase the escape velocity. Taking this to its extreme, we can imagine taking ...
... The equations of gravity tell us that the escape velocity for a spherical object (such as a star or planet) is given by vesc = GM/R. Thus, if we make an object more massive (larger M) or compress it (smaller R), then we increase the escape velocity. Taking this to its extreme, we can imagine taking ...
Energy Is Conserved in the Classical Theory of General Relativity
... the action includes terms with second derivatives. This provides a more modern approach to the derivation of an energy current that has a dependency on the time translation vector field. Since it does not require any manipulations of the action the result is a covariant local expression. I am avoidi ...
... the action includes terms with second derivatives. This provides a more modern approach to the derivation of an energy current that has a dependency on the time translation vector field. Since it does not require any manipulations of the action the result is a covariant local expression. I am avoidi ...
near-infrared adaptive optics imaging of high-redshift
... properties of the host galaxy, found to be consistent with those of massive elliptical galaxies of MR 24:7 for the one radio-loud quasar, and MR 23:8 for the two radio-quiet quasars. When combined with existing data at lower redshift, these new observations depict a scenario where the host gal ...
... properties of the host galaxy, found to be consistent with those of massive elliptical galaxies of MR 24:7 for the one radio-loud quasar, and MR 23:8 for the two radio-quiet quasars. When combined with existing data at lower redshift, these new observations depict a scenario where the host gal ...
Six thousand versus 14 Billion: How large and how old is the
... Already with some basic understanding of trigonometry and common sense, it is straightforward to show that the universe is far larger than 6000 lightyears – the distance light can travel in 6000 years. As a next step, I will address the questions of whether the speed of light could change or whe ...
... Already with some basic understanding of trigonometry and common sense, it is straightforward to show that the universe is far larger than 6000 lightyears – the distance light can travel in 6000 years. As a next step, I will address the questions of whether the speed of light could change or whe ...
790121《Taking Back Astronomy》(Jason Lisle)
... If we were to drive 65 miles per hour (105 km/hr), it would take 163 years to drive this distance. We couldn’t drive this far in our lifetime. The sun is far from the earth, and yet the earth is much closer to the sun than many of the other planets. Consider Pluto, a tiny frozen world at the outer e ...
... If we were to drive 65 miles per hour (105 km/hr), it would take 163 years to drive this distance. We couldn’t drive this far in our lifetime. The sun is far from the earth, and yet the earth is much closer to the sun than many of the other planets. Consider Pluto, a tiny frozen world at the outer e ...
The Milky Way Galaxy (ch. 23)
... Nobody knows what dark matter is, but a few possibilities have been ruled out. Candidates for dark matter: Faint red stars or brown dwarfs—can now rule this out. (p. ...
... Nobody knows what dark matter is, but a few possibilities have been ruled out. Candidates for dark matter: Faint red stars or brown dwarfs—can now rule this out. (p. ...
Speculations on dark matter as a luminiferous
... amount is enough to make the cosmological parameter, Ω equal to unity. While not wishing to distract those engrossed in these efforts, we wish to open another front for research by other speculators, namely what role dark matter would have to play as a light transmitting medium (i.e. as a luminifer ...
... amount is enough to make the cosmological parameter, Ω equal to unity. While not wishing to distract those engrossed in these efforts, we wish to open another front for research by other speculators, namely what role dark matter would have to play as a light transmitting medium (i.e. as a luminifer ...
Chapter 26 Photons
... which is the expected result. While λ max changes with temperature, the relative shape of the spectrum of radiated intensities does not. Figure (1) is a general sketch of the blackbody radiation spectrum. To determine the blackbody spectrum for another temperature, first calculate the new value of λ ...
... which is the expected result. While λ max changes with temperature, the relative shape of the spectrum of radiated intensities does not. Figure (1) is a general sketch of the blackbody radiation spectrum. To determine the blackbody spectrum for another temperature, first calculate the new value of λ ...
The Intricate Role of Cold Gas and Dust in Galaxy Evolution at Early
... holds, but UV SFRs would be ~2-10x too high with standard (lower-z) dust corrections! ...
... holds, but UV SFRs would be ~2-10x too high with standard (lower-z) dust corrections! ...
Seminar 2
... the galaxy. Examples of such explanations are gas consumption and weak interactions with smaller galaxies. The contribution of Active Galactic Nuclei was also discussed but more work is needed in this area. It seems however that the dust heating by AGNi is not the explanation of the decline in SFR. ...
... the galaxy. Examples of such explanations are gas consumption and weak interactions with smaller galaxies. The contribution of Active Galactic Nuclei was also discussed but more work is needed in this area. It seems however that the dust heating by AGNi is not the explanation of the decline in SFR. ...
Galaxies
... Kepler’s Law • The flat rotation curve at large distance indicates the presence of extended halo of no-luminous matter, or dark matter ...
... Kepler’s Law • The flat rotation curve at large distance indicates the presence of extended halo of no-luminous matter, or dark matter ...
Non-standard cosmology
A non-standard cosmology is any physical cosmological model of the universe that has been, or still is, proposed as an alternative to the Big Bang model of standard physical cosmology. In the history of cosmology, various scientists and researchers have disputed parts or all of the Big Bang due to a rejection or addition of fundamental assumptions needed to develop a theoretical model of the universe. From the 1940s to the 1960s, the astrophysical community was equally divided between supporters of the Big Bang theory and supporters of a rival steady state universe. It was not until advances in observational cosmology in the late 1960s that the Big Bang would eventually become the dominant theory, and today there are few active researchers who dispute it.The term non-standard is applied to any cosmological theory that does not conform to the scientific consensus, but is not used in describing alternative models where no consensus has been reached, and is also used to describe theories that accept a ""big bang"" occurred but differ as to the detailed physics of the origin and evolution of the universe. Because the term depends on the prevailing consensus, the meaning of the term changes over time. For example, hot dark matter would not have been considered non-standard in 1990, but would be in 2010. Conversely, a non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in 2010.